EP0695535A1 - Ultrasonic haemostatic and cutting instrument - Google Patents
Ultrasonic haemostatic and cutting instrument Download PDFInfo
- Publication number
- EP0695535A1 EP0695535A1 EP95305369A EP95305369A EP0695535A1 EP 0695535 A1 EP0695535 A1 EP 0695535A1 EP 95305369 A EP95305369 A EP 95305369A EP 95305369 A EP95305369 A EP 95305369A EP 0695535 A1 EP0695535 A1 EP 0695535A1
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- EP
- European Patent Office
- Prior art keywords
- elements
- tissue
- cutting element
- cutting
- shaft
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/28—Surgical forceps
- A61B17/29—Forceps for use in minimally invasive surgery
- A61B17/295—Forceps for use in minimally invasive surgery combined with cutting implements
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/068—Surgical staplers, e.g. containing multiple staples or clamps
- A61B17/072—Surgical staplers, e.g. containing multiple staples or clamps for applying a row of staples in a single action, e.g. the staples being applied simultaneously
- A61B17/07207—Surgical staplers, e.g. containing multiple staples or clamps for applying a row of staples in a single action, e.g. the staples being applied simultaneously the staples being applied sequentially
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/11—Surgical instruments, devices or methods, e.g. tourniquets for performing anastomosis; Buttons for anastomosis
- A61B17/115—Staplers for performing anastomosis in a single operation
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/11—Surgical instruments, devices or methods, e.g. tourniquets for performing anastomosis; Buttons for anastomosis
- A61B17/115—Staplers for performing anastomosis in a single operation
- A61B17/1155—Circular staplers comprising a plurality of staples
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/32—Surgical cutting instruments
- A61B17/320016—Endoscopic cutting instruments, e.g. arthroscopes, resectoscopes
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/28—Surgical forceps
- A61B17/29—Forceps for use in minimally invasive surgery
- A61B17/2909—Handles
- A61B2017/2912—Handles transmission of forces to actuating rod or piston
- A61B2017/2923—Toothed members, e.g. rack and pinion
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/28—Surgical forceps
- A61B17/29—Forceps for use in minimally invasive surgery
- A61B2017/2926—Details of heads or jaws
- A61B2017/2932—Transmission of forces to jaw members
- A61B2017/2943—Toothed members, e.g. rack and pinion
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/32—Surgical cutting instruments
- A61B17/320068—Surgical cutting instruments using mechanical vibrations, e.g. ultrasonic
- A61B17/320092—Surgical cutting instruments using mechanical vibrations, e.g. ultrasonic with additional movable means for clamping or cutting tissue, e.g. with a pivoting jaw
- A61B2017/320093—Surgical cutting instruments using mechanical vibrations, e.g. ultrasonic with additional movable means for clamping or cutting tissue, e.g. with a pivoting jaw additional movable means performing cutting operation
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/32—Surgical cutting instruments
- A61B17/320068—Surgical cutting instruments using mechanical vibrations, e.g. ultrasonic
- A61B17/320092—Surgical cutting instruments using mechanical vibrations, e.g. ultrasonic with additional movable means for clamping or cutting tissue, e.g. with a pivoting jaw
- A61B2017/320095—Surgical cutting instruments using mechanical vibrations, e.g. ultrasonic with additional movable means for clamping or cutting tissue, e.g. with a pivoting jaw with sealing or cauterizing means
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/32—Surgical cutting instruments
- A61B17/320068—Surgical cutting instruments using mechanical vibrations, e.g. ultrasonic
- A61B17/320092—Surgical cutting instruments using mechanical vibrations, e.g. ultrasonic with additional movable means for clamping or cutting tissue, e.g. with a pivoting jaw
- A61B2017/320097—Surgical cutting instruments using mechanical vibrations, e.g. ultrasonic with additional movable means for clamping or cutting tissue, e.g. with a pivoting jaw with stapling means
Definitions
- the mechanical cutting action of the knife blade may be controlled either mechanically or through other control mechanisms.
- an electronic instrument control may be used to control the rate of cutting element movement to insure that the knife is in contact with the tissue for a sufficient amount of time to enable cauterization.
- a pressure detector or strain gauge may be used to detect tissue presence, status or type.
- Electrical parameters may be used to sense and determine the variation in load conditions on the cutting element as acoustical impedance is related to the system impedance of the generator and instrument. In such a system, either phase differences of voltage and current or magnitude ratios of voltage and current supplied to the transducer, are used to make this determination.
- the shaft 14 includes insulation 15 surrounding the outer diameter of the shaft 14.
- the insulation 15 is preferably constructed of a material which has a low thermal and electrical conductivity and a low coefficient of friction such as teflon or poly carbonate.
- the shaft 14 is isolated from the insulation 15 at nodal points 16 by O-rings 29.
- the O-rings 29 preferably comprise non-ultrasonic energy conductive material such as a plastic.
- Nodal points 16 are the points at which the sine of the ultrasonic vibration amplitude is equal to zero, i.e., where the ultrasonic vibration energy is minimized.
Abstract
Description
- This invention relates to a therapeutic ultrasonic instrument for cutting, cauterization, coagulation and/or tissue welding in the performance of surgical procedures, especially endoscopic procedures.
- Surgical procedures frequently require cutting of tissue causing bleeding at the site of the cutting. Thus hemostasis is important in surgical procedures. Hemostasis is even more crucial in endoscopic or laparoscopic surgery where if the bleeding is not kept under control, the laparoscopy must be abandoned and the patient's body cut to perform open surgery so that inaccessible bleeding may be controlled.
- Various techniques have been adopted to control bleeding with varying degrees of success, such as, for example, suturing, applying clips to blood vessels, stapling, as well as tissue heating, laser, electrocautery and ultrasonic techniques.
- Surgical staplers have been used for tissue joining and to provide hemostasis in conjunction with tissue cutting. Such devices include, for example, linear and circular cutting and stapling instruments. Typically, a linear cutter has parallel rows of staples aligned in a cartridge with a slot through which a cutting means may pass between the rows of staples. This type of surgical stapler secures the tissue for improved cutting, joins layers of tissue, and provides hemostasis by applying parallel rows of staples to layers of surrounding tissue, as a cutting means cuts between parallel rows. These types of cutting and stapling devices have been used successfully in procedures involved in fleshy tissue such as, muscle or bowel, particularly in bowel resection procedures. Similarly, circular cutting and stapling devices have successfully been used, for example, in anastomotic procedures where a lumen is rejoined.
- However, improvements are desirable with such cutting and stapling devices to optimize the hemostasis, particularly where the procedure involves cutting highly vascularized tissue, such as mesentery or adnexa, which is prone to having hemostasis problems.
- Ultrasonically energized surgical instruments have been used to cut and simultaneously coagulate or cauterize tissue. Typically, such devices include a knife blade at the end of the instrument which receives and transmits ultrasonic energy at a therapeutic amplitude and frequency. Such devices may be used to cut and/or to cauterize tissue. However, these devices are sometimes difficult to use to manipulate tissue and achieve the desired cutting and/or coagulating effect.
- It is therefore an object of the present invention to provide a therapeutic ultrasonic cutting and hemostatic instrument which is capable of holding or grasping tissue as it is cut and/or cauterized by an ultrasonic cutting element.
- It is a further object of the invention to provide an ultrasonic cutting and stapling device adapted to cauterize and cut tissue along a cutting path generally adjacent a line of placed staples.
- It is yet another object of the invention to provide a linear cutting and stapling device with parallel rows of staples between which an ultrasonic knife blade is used to cut and coagulate blood vessels.
- It is yet another object of the invention to provide a circular cutting and stapling device with a circular ultrasonic cutting element or blade for cutting and coagulating tissue in a cutting path adjacent placed staples.
- These and other objects of the invention are illustrated in a surgical instrument including an end effector capable of engaging tissue and an ultrasonic cutting and coagulating element associated with the end effector for cutting and cauterizing tissue engaged by the end effector.
- Preferably the end effector is comprised of a first and second element pivotally or otherwise movable with respect to each other to engage tissue therebetween.
- In one embodiment the first and second elements close together to engage tissue. An ultrasonically vibrating cutting element associated with the end effector is then passed through the engaged tissue to cut and cauterize the tissue. In a variation of this embodiment, the first and second elements close together to engage tissue. An ultrasonic cutting blade extends from either the first or second elements, and is in contact with the tissue when the elements are closed together. When it has been determined that the tissue is appropriately situated between elements, the cutting blade is energized. The blade, which in this particular embodiment is preferably dull, acts as a cutting element when ultrasonically vibrated to cut the engaged tissue.
- In another embodiment, the first and second elements engage tissue and apply staples either prior to or as the ultrasonic cutting element is passed through a slot extending longitudinally through first and second elements. Thus the cut is made adjacent the staple line. For example, a linear cutting instrument with an ultrasonically energized blade may be used. In such instrument, one or more rows of staples is applied on each side of a cutting path defined as an ultrasonically energized blade is passed between the row of staples through a slot in the end effector. Or, for example, a circular stapling instrument may include an ultrasonically energized blade. In such instrument, staples are used to connect two lumens of tissue and a circular cutting element vibrating at an ultrasonic frequency, cuts the tissue adjacent the staples to open the lumen while providing hemostasis through tissue cauterization.
- The mechanical cutting action of the knife blade may be controlled either mechanically or through other control mechanisms. For example an electronic instrument control may be used to control the rate of cutting element movement to insure that the knife is in contact with the tissue for a sufficient amount of time to enable cauterization.
- Another embodiment provides a means for detecting an abnormal load which is out of a predetermined range. This feature may be used for detecting instrument abnormalities, as well as to provide feedback to the user as to the status of the tissue that is being treated.
- In one embodiment, the feedback mechanism may comprise an acoustical impedance feedback system in which a light sensor located on an inactive portion of the instrument is used to detect light emitted from a light source and reflected from an active portion, i.e., an ultrasonically vibrating portion of the instrument, to determine the load or impeding effect of tissue on the cutting element.
- In another embodiment the feedback mechanism may comprise a passive piezoelectric element located within a piezoelectric stack of an ultrasonic transducer. The passive element vibrates with the other piezoelectric ceramic elements of the stack, but unlike the other elements, is not energized. The vibration of the passive element creates an oscillating voltage across the element which corresponds to the vibrations of the piezoelectric stack. From the voltage across the element the load on the cutting element can be determined by methods well-known in the art. The passive element may be coupled to a control means of a generator used to supply electrical energy to the ultrasonic transducer to cause vibrations.
- Other feedback systems may also be used, for example, a pressure detector or strain gauge may be used to detect tissue presence, status or type. Electrical parameters may be used to sense and determine the variation in load conditions on the cutting element as acoustical impedance is related to the system impedance of the generator and instrument. In such a system, either phase differences of voltage and current or magnitude ratios of voltage and current supplied to the transducer, are used to make this determination.
- These and other objects of the invention will be better understood from the following attached detailed description of the drawings when taken in conjunction with the Detailed Description of the Invention.
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- Fig. 1 illustrates a side view of an ultrasonic hemostatic cutting instrument of the present invention;
- Fig. 2 illustrates a break away perspective view of the instrument of Fig. 1;
- Fig. 3 illustrates a side view of the distal end of the end effector of the instrument in Fig. 1;
- Fig. 4 illustrates a top view of the distal end of the end effector of the instrument in Fig. 1;
- Fig. 5 illustrates a front view of the distal end of the end effector of the instrument in Fig. 1;
- Fig. 6 is a perspective view of an endoscopic ultrasonic linear stapling and cutting instrument of a first embodiment of the present invention;
- Fig. 7 is a side cross-sectional view of the instrument of Fig. 6;
- Fig. 8 is an enlarged side cross-sectional view of the instrument housing of the instrument of Fig. 7;
- Fig. 9 is an enlarged cross-sectional view of the end effector of the instrument illustrated in Fig. 7;
- Fig. 10 is a top view of the second tissue engaging element of the end effector of the instrument of Fig. 6;
- Fig. 11 is a side partial cut away view of a circular cutting instrument of a second embodiment of the present invention;
- Fig. 12 is an enlarged cross-sectional view of the end effector of the instrument illustrated in Fig. 11;
- Fig. 13 is an enlarged cross-sectional view of the handle of the instrument illustrated in Fig. 11;
- Fig. 14 is a front end view of the cutting portion of the end effector of the instrument in Fig. 11 along the lines 14-14;
- Fig. 15 illustrates a back end view of the anvil portion of the end effector of the instrument in Fig. 11.
- Referring now to Figs 1-5 there is illustrated a first embodiment of a
hemostatic cutter 37 of the present invention. The cutter comprises ahandle 38, coupled to anouter tube 39 and anend effector 40 extending from the distal end of theouter tube 39. Theend effector 40 includes twojaw members 41 adapted to close together to engage, grasp or hold tissue between thejaw members 41. Aslot 43 extends longitudinally through the jaws to receive a cuttingelement 49 associated with the end effector. - The
handle 38 includes aclosure trigger 44 coupled to aninner tube 45 extending through theouter tube 39. When actuated, theclosure trigger 44 moves theinner tube 45 longitudinally over a ramped portion of thejaw members 41 to close thejaw members 41 together. - The
handle 38 also includes cuttingactuation button 46 which is couple to ashaft 47 extending throughinner tube 45. Theshaft 47 includes an ultrasonic piezoelectric stack 48 adapted to propagate ultrasonic vibrations along theshaft 47 when thestack 48 is provided with electrical energy. A cuttingelement 49 is coupled to the distal end of theshaft 47. - An
insulation 42 extends substantially along the length of theshaft 47 and is separated from theshaft 47 by O-rings 34 at nodal points along the length of theinsulation 42. The cuttingelement 49 ends at an anti node. - In operation, the
jaw members 41 are placed around tissue to be treated. Theclosure trigger 44 is actuated to move theinner tube 45 distally over a ramped portion of thejaw members 41 to close thejaw members 41 over the tissue. - Energy is supplied to the
ultrasonic stack 48 in a manner similar to the device illustrated in Figs. 6-11 as described in more detail below, i.e., by deliver of electrical energy through wires from a generator to theultrasonic stack 48. The user then advances the cuttingactuation button 46 which thereby distally advances theshaft 47 and advances the ultrasonically vibrating cuttingelement 49 through theslot 43 and through the grasped tissue, cutting and simultaneously cauterizing the tissue. - Referring now to Figs. 6-10 there is illustrated another embodiment of the present invention. A linear cutting and stapling
instrument 100 is shown having an actuation end orhousing 20 coupled to anouter tube 12 out of which an end effector 11 extends. The end effector 11 has first and secondtissue engaging elements second elements elements closure trigger 21 onhousing 20 which advances theouter tube 12 over the proximal ends ofelements - An ultrasonic transducer which is comprised of a
piezoelectric stack 23 is contained withinhousing 20. The piezoelectric stack is comprised of piezoelectric ceramic transducer elements alternatively energized by positive and ground electrodes (not shown). Thestack 23 is coupled to ashaft 14 which extends through theouter tube 12 and ends in a cuttingelement 28. Thestack 23 includes anamplifier 24 on its distal end with transitions into ashaft 14. Theshaft 14 andamplifier 24 are preferably constructed of a material which efficiently conducts ultrasonic energy such as an alloy of titanium or aluminum. Theamplifier 24 amplifies ultrasonic waves which are then transmitted through down theshaft 14 to the cuttingelement 28. - The
shaft 14 includesinsulation 15 surrounding the outer diameter of theshaft 14. Theinsulation 15 is preferably constructed of a material which has a low thermal and electrical conductivity and a low coefficient of friction such as teflon or poly carbonate. Theshaft 14 is isolated from theinsulation 15 atnodal points 16 by O-rings 29. The O-rings 29 preferably comprise non-ultrasonic energy conductive material such as a plastic. Nodal points 16 are the points at which the sine of the ultrasonic vibration amplitude is equal to zero, i.e., where the ultrasonic vibration energy is minimized. -
Voltage supply wires 25 representing positive and ground electrodes, enter through the handle and are coupled to theultrasonic stack 23. Thewires 25 are electrically isolated from each other, a first wire coupled to a positive electrode of the stack and the second wire coupled to the ground electrode. Thewires 25 lead to agenerator 26, external to theinstrument 100 as schematically illustrated in Fig. 2. When energy is supplied via thegenerator 26 to thestack 23, thestack 23 vibrates at a predetermined ultrasonic frequency. Thestack 23 thus acts as an ultrasonic transducer. Other ultrasonic transducers, for example, a magneto-restrictive element, alternatively may be used. - The
nodal points 16 are spaced at equal distances from an adjacent nodal point. Thepiezoelectric stack 23 itself is centered onnodal point 16. Thenodal points 16 are at a distance along the shaft equal to an integer multiple of 1/2 wavelength of a predetermined ultrasonic frequency. Afootswitch 27, also schematically illustrated, is connected to the generator and may be used to switch on and off the electrical energy supply to theultrasonic stack 23. - The
stack 23 and theshaft 14 are longitudinally movable in distal and proximal directions through theouter tube 12. A firingtrigger 22 is used to fire thestaples 32 and advance the cuttingelement 28, after theclosure trigger 21 has been actuated to engage tissue between theelements trigger 22 advances thegear 33 which translates a user force applied to the firingtrigger 22 into longitudinal movement of thestack 23,shaft 14 and cuttingelement 28. - When the firing
trigger 22 is actuated, the cuttingelement 28 moves within aslot 31 extending longitudinally through first andsecond elements drivers 30 for driving staples through engaged tissue. Thedrivers 30 move within thesecond element 18 simultaneously with the movement of the cuttingelement 28. Thesecond element 18 includes acartridge 35 containingstaples 32 arranged in parallel rows on each side ofslot 31 while thefirst element 17 comprises ananvil 36 for closing thestaples 32. - Ultrasonic energy is transmitted from the
stack 23 along theshaft 14 into the cuttingelement 28 which transmits the energy to the tissue engaged by theelements shaft 14 is moved distally, an ultrasonically vibrating cuttingelement 28 cuts and cauterizes the tissue engaged by the first andsecond element drivers 30 fire staples simultaneously on each side of the cut line. The ultrasonic energy causes cutting or dissection of the tissue as well as cauterization. It is believed that when the tissue has cauterized to a desirable degree, the tissue will decouple from the cutting element which is initially in contact with the tissue. The user or a control mechanism controls the speed of cuttingelement 28 actuation so that cuttingelement 28 will have sufficient contact time with the tissue in order to cauterize the tissue to a desired degree. - Referring now to Figs. 11-15 there is illustrated another embodiment of the present invention. A
circular stapling instrument 50 is shown having ahousing portion 51 including a firingtrigger 53 and aclosure knob 52; a hollowouter tube 54 coupled to thehousing 51; and anend effector 58 coupled to the distal end of theouter tube 54. - The
closure knob 52 is rotatable with respect to thehandle 51 and is coupled to aclosure shaft 69 extending longitudinally through theouter tube 54 to theend effector 58. The firingtrigger 53 is adapted to move anactuation shaft 76 longitudinally through theouter tube 54. In this embodiment theshaft 76 is hollow with theclosure shaft 69 extending longitudinally through theshaft 76 and appropriately insulated from theshaft 76 by the 0-ring 77 atnodal points 57. These 0-rings 77 alsoseparate insulation 56 surrounding the outer diameter of theshaft 76 from the shaft. An alternative embodiment may include a solid shaft for delivering ultrasonic vibrations to a cutting element, where the closure shaft is a hollow tube surrounding the outer diameter of the shaft. - The
end effector 58 comprises afirst element 59 and asecond element 60. Thefirst element 59 includes a firsttissue engaging surface 70 and aopening 71. A cuttingelement 55 is contained in saidfirst element 59 and is adapted to extend from the distal end of saidfirst element 59 through theopening 71. Thesecond element 60 extends distally of thefirst element 59 and includes a secondtissue engaging surface 72 on its proximal end. The secondtissue engaging surface 72 includes ananvil 73 for receivingstaples 62 driven fromfirst element 59 through tissue engaged by first andsecond elements - The cutting
element 55 includes towards its proximal end, an ultrasonicpiezoelectric stack 64 for generating ultrasonic vibrations. A pair ofwires 66 are in electrical communication with thestack 64. Thewires 66 extend out of thehandle 51 and are in communication with agenerator 67, schematically illustrated in Fig. 11. Agenerator 67 supplies electrical energy throughwires 66 to ultrasonicpiezoelectric stack 64 to cause the stack to vibrate at a predetermined ultrasonic frequency. Afootswitch 68, also schematically illustrated in Fig. 11, is coupled to thegenerator 67. Thefootswitch 68 may be used to switch on and off thegenerator 67. - In use, the first and
second elements first element 59. Typically the first lumen has been closed by a purse string type suture around aconnector pin 75 extending distally from thefirst element 59. The first lumen is to be rejoined by tissue forming a second lumen. The second lumen is engaged by thesecond element 60. The second lumen is closed by a purse string type suture around ashaft connector 74 extending proximally from thesecond element 60. Theclosure shaft 69 ends in aconnector pin 75 which extends distally from thefirst element 59. Theconnector pin 75 is inserted and locked into theshaft connector 74 adapted to receive theconnector pin 75. Thesecond element 60 is then moved towards thefirst element 59 in a proximal direction by the rotation ofclosure knob 52 which in turn rotates and retracts theclosure shaft 69. Theclosure shaft 69 extends through theouter tube 54 and is rotatable coupled to thesecond element 60. The rotation of theclosure shaft 69 brings the tissue lumen engaged by thefirst element 59 adjacent to the lumen tissue engaged by thesecond element 60. When this has occurred the instrument is ready to be fired. - The firing of the instrument is actuated by the firing
trigger 53 which moves theshaft 76, and thus the cuttingelement 55, in a proximal direction. At the same time the firingtrigger 53 moves thedriver base 61 distally. Thedriver base 61 in turn advances thedriver 63 to drive thestaples 62 from thefirst element 59 through the tissue and into theanvil 73 of thesecond element 60. Thus, the tissue is joined by the staples and at the same time the cutting element cuts excess tissue from the first and second tissue lumens blocking the newly formed lumen. The circular cutter is operated in a manner similar to that of mechanical circular cutters known in the art. An example of such device is described, for example, in U.S. Patent No. 5,104,025 incorporated herein by reference. - The
ultrasonic stack 64 is centered on anodal point 57 on the cuttingelement 55. The cuttingelement 55 is surrounded byinsulation 56 which only contacts the cuttingelement 55 atnodal points 57. - As the instrument is being fired, the
footswitch 68 is also used to activate thegenerator 67 to supply electrical energy to theultrasonic stack 64. Thestack 64 vibrates at a predetermined ultrasonic frequency. The ultrasonic vibrations are propagated down theshaft 76 to the cuttingelement 55. When the firingtrigger 53 is actuated, the cuttingelement 55 extends from the distal end of the second element to cut the tissue as described above. If the footswitch is activated, ultrasonic energy is transmitted down the cuttingelement 55 to the distal end of the cuttingelement 55. The ultrasonic energy may provide both cutting energy and cauterization energy to the tissue being cut. - Several variations of this inventions have been described in connection with two specific embodiments involving endoscopic cutting and stapling. Naturally, the invention may be used in numerous applications where hemostasis is desired. For example, these devices may be used with or without staples. Other instruments with ultrasonic energized tissue grasping cutting and/or cauterizing elements are intended to be within the scope of the invention. Accordingly, it will be understood by those skilled in the art that various changes and modifications may be made in the invention without departing from its scope which is defined by the following claims and their equivalents.
Claims (10)
- A surgical instrument comprising:
an end effector including first and second elements, at least one of said first and second elements moveable relative to the other element for engaging tissue between said first and second element;
a cutting element associated with said end effector, said cutting element adapted to cut and/or cauterize tissue engaged by said first and second elements;
a shaft coupled to said cutting element;
an ultrasonic transducer coupled to said shaft, said transducer adapted to propagate ultrasonic vibrations along said shaft to said cutting element;
an electrical energy communication means for delivering electrical energy to said transducer to cause said transducer to vibrate at an ultrasonic frequency. - The surgical instrument of claim 1 wherein said first and second elements are isolated from said ultrasonic vibration of said cutting element.
- The surgical instrument of claim 1 wherein one of said first and second elements comprises a staple cartridge containing staples; and
wherein the other of said first and second elements comprises an anvil adapted to receive and close staples driven from said cartridge through tissue engaged by said first and second elements. - A surgical instrument comprising:
an actuation end;
a hollow tube coupled to said actuation end;
an end effector extending distally from said tube;
said end effector comprising first and second elements, at least one of said first and second elements moveable with respect to the other of said first and second elements to engage tissue therebetween;
an opening extending longitudinally through said first element;
a shaft within said tube said shaft having a distal end;
a cutting element coupled to said distal end of shaft, said cutting element adapted to be moved through said opening to cut and/or cauterize tissue engaged by said first and second elements; and
an ultrasonic transducer associated with said shaft, said transducer adapted to propagate ultrasonic vibrations to said cutting element. - The surgical instrument of claim 4 wherein one of said first and second elements comprise a staple cartridge containing staples; and
wherein the other of said first and second elements comprises an anvil adapted to receive and close staples driven from said cartridge through tissue engaged by said first and second elements. - The surgical instrument of claim 5 wherein said staples are arranged in at least one parallel row adjacent said slot.
- The surgical instrument of claim 5 wherein said cutting element follows a cutting path defined by said slot, said cutting path having opposite longitudinal sides; and
wherein said staples are arranged adjacent each of said sides of said cutting path. - A surgical instrument comprising:
an end effector including first and second elements, wherein at least one of said first and second elements is moveable with respect to the other element to engage tissue therebetween;
a cutting element adapted to extend from said first element to contact tissue engaged by said first and second elements;
a shaft coupled to said cutting element;
an ultrasonic transducer coupled to said shaft, said transducer adapted to propagate ultrasonic vibrations along said shaft to said cutting element to cause said cutting element to cut and/or cauterize tissue; and
an electrical energy communication means for delivering electrical energy to said transducer to cause said transducer to vibrate ultrasonically. - A surgical instrument comprising:
a handle;
a hollow tube coupled to said handle;
an end effector extending distally from said tube, said end effector comprising first and second elements, at least one of said first and second elements moveable with respect to the other to engage tissue therebetween;
an opening extending longitudinally through said first element;
a cutting element associated with said first element, said cutting element adapted to extend from said first element through said opening to cut and/or cauterize tissue between said first and second elements; and
an ultrasonic transducer adapted to transmit ultrasonic vibrations said cutting element. - The surgical instrument of claim 9 wherein said first element comprises a staple cartridge containing staples;
wherein said second element comprises an anvil adapted to receive and close staples driven from said cartridge through tissue engaged by said first and second elements;
wherein said first element is adapted to engage a first lumen and said second element is adapted to engage a second lumen;
wherein said staples are arranged to join the first lumen to the second lumen; and
wherein said cutting element is approximately circular in shape.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US28433894A | 1994-08-02 | 1994-08-02 | |
US284338 | 1994-08-02 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0695535A1 true EP0695535A1 (en) | 1996-02-07 |
EP0695535B1 EP0695535B1 (en) | 2002-02-27 |
Family
ID=23089822
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP95305369A Expired - Lifetime EP0695535B1 (en) | 1994-08-02 | 1995-08-01 | Ultrasonic haemostatic and cutting instrument |
Country Status (8)
Country | Link |
---|---|
US (1) | US6004335A (en) |
EP (1) | EP0695535B1 (en) |
JP (1) | JPH0856953A (en) |
AT (1) | ATE213610T1 (en) |
AU (1) | AU694225B2 (en) |
CA (1) | CA2155078C (en) |
DE (1) | DE69525573T2 (en) |
ES (1) | ES2172556T3 (en) |
Cited By (93)
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Also Published As
Publication number | Publication date |
---|---|
US6004335A (en) | 1999-12-21 |
CA2155078A1 (en) | 1996-02-03 |
AU2501495A (en) | 1996-02-15 |
JPH0856953A (en) | 1996-03-05 |
AU694225B2 (en) | 1998-07-16 |
CA2155078C (en) | 2006-12-05 |
EP0695535B1 (en) | 2002-02-27 |
DE69525573T2 (en) | 2002-07-04 |
ATE213610T1 (en) | 2002-03-15 |
ES2172556T3 (en) | 2002-10-01 |
DE69525573D1 (en) | 2002-04-04 |
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